## Qantler Technologies –  Fresher Interview Questions – Part – III

### This blog explains about Qantler Technologies –  Fresher Interview Questions – Part – III . Some of the questions are discussed below . They are :

We have already discussed about few questions in the previous blogs – Qantler Technologies –  Fresher Interview Questions – Part – I & II

REFERENCES :

https://payilagam.com/blogs/qantler-technologies-fresher-interview-questions-part-i/

https://payilagam.com/blogs/qantler-technologies-fresher-interview-questions-part-ii/

https://payilagam.com/blogs/qantler-technologies-fresher-interview-questions-part-ii/

1. Write a program to Print  star in triangle format ?

## Print star pattern in java

class StarTriangle

{

public static void main(String[] args)

{int i,j,k;

for(i=1; i<=5; i++)

{

for(j=4; j>=i; j–)

{

System.out.print(” “);

}

for(k=1; k<=(2*i-1); k++){

System.out.print(“*”);

}

System.out.println(“”);

}

}

}

## Output

*

*  *

*  *  *

*  *  *  *

*   *  *  *  *

______________________________________________________________________________

2. Find  duplicate elements In Array

// C++ program to find

// duplicates in the given array

#include <bits/stdc++.h>

using namespace std;

// function to find and print duplicates

void printDuplicates(int arr[], int n)

{

// unordered_map to store frequencies

unordered_map<int, int> freq;

for (int i=0; i<n; i++)

freq[arr[i]]++;

bool dup = false;

unordered_map<int, int>:: iterator itr;

for (itr=freq.begin(); itr!=freq.end(); itr++)

{

// if frequency is more than 1

// print the element

if (itr->second > 1)

{

cout << itr->first << ” “;

dup = true;

}

}

// no duplicates present

if (dup == false)

cout << “-1”;

}

// Driver program to test above

int main()

{

int arr[] = {12, 11, 40, 12, 5, 6, 5, 12, 11};

int n = sizeof(arr) / sizeof(arr[0]);

printDuplicates(arr, n);

return 0;

}

Output:

12 11 5

___________________________________________________________________

3. Write a program to Reverse a string ?

 // Java program to ReverseString using ByteArray. import java.lang.*; import java.io.*; import java.util.*;   // Class of ReverseString class ReverseString {     public static void main(String[] args)     {         String input = “Payilagam”;           // getBytes() method to convert string          // into bytes[].         byte [] strAsByteArray = input.getBytes();           byte [] result =                     new byte [strAsByteArray.length];           // Store result in reverse order into the         // result byte[]         for (int i = 0; i

Run on IDE

Output:

“magaliyaP”

______________________________________________________________________________

4 . Write a program to print even numbers in an array ?

 Print even numbers in  array    main()

 02 {

 03

 04 int a[100], n = 0, i = 0; //init

 05 printf(“Enter the number of elements\n”);

 06 scanf(“%d”, &n);

 07 for(i=0; i

 08

 09 {

 10 scanf(“%d”, &a[i]);

 11 }

 12

 13 for(i=0; i

 14

 15 {

 16 if(a[i]%2==0) //test if even

 17 if (a[i] < 0) //if is even test if negative

 18 {

 19 printf(“The negative even number %d \n”, a[i]);

 20 }

 21

 22 }

 23

 24 }

__________________________________________________________________________________